Oh yes they should. Universal's MOD blu-ray line has helped them release some less popular movies, including direct-to-dvd sequels. If they can release obscure sequels like Dragonheart: A New Beginning, then they can surely release the sequels on blu-ray, especially when they already have HD transfers ready that they can just put onto a disc. The only downside is that they would probably release them individually and you would have to pay for each sequel blu ray release.